Pollutant Effect on the Pedestrians and Bicyclists for the Different Setting of Bus Lanes in Urban Street Canyons

Abstract:

In order to study the pollutant effect on the pedestrians and bicyclists for the different setting of bus lanes, the numerical simulation of pollutant dispersion for isolated street canyon was conducted based on a two dimensional k-ε turbulence model and species transport equation. The simulation results fit well with the corresponding wind tunnel tests. The analysis result shows that the pollutant concentration at the leeward side is evidently higher than that of the windward side in the isolated street canyon. The pollutant concentration for the bicycle lane is obviously higher than that of the sidewalk near the ground at the leeward side. As the height increases, the pollutant concentration for the sidewalk is higher than that of the bicycle lane instead. The pollutant concentrations for the sidewalk and the bicycle lane are nearly the same, and almost no change with the height increases at the windward side. When the density of bus lane is low, the emission intensity of the bus lanes is lower than that of the vehicle lanes, and setting of outside bus lanes will have less pollution to the pedestrians and bicyclists. And when the density of bus lane is high, the emission intensity of the bus lanes is higher than that of the vehicle lanes, and setting of inside bus lanes will have less pollution to the pedestrians and bicyclists.

• Periodical: Advanced Materials Research (Volumes 518-523)
• Pages: 3038-3044
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.518-523.3038
• Online since: May 2012
• Authors: Li Lei, Jian Zhang Wang, Heng Zhang
• Keywords: Bus Lane, Numerical Simulation, Pedestrian and Bicyclist, Pollutant Dispersion, Street Canyon

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